Year Dollars 1992-01-01 3309418 2007-01-01 13373788 2008-01-01 35279592 2009-01-01 73804603 2010-01-01 68417462 2011-01-01 76472513 2012-01-01 52540148 2013-01-01 46607875 2014-01-01 29035953 2015-01-01 29283966 2016-01-01 33619512